22
Building link cables
From Mark Levinson digital processor
To Nº37
Locking tab
Locking tab
3
EXTERNAL IR INPUT
The Nº37 incorporates an infrared repeater input to facilitate a wide range
of installation options. If desired, the Nº37 may be placed inside a cabinet
or outside the normal line-of-sight in the listening area, with the controlling
IR signal being relayed to the Nº37 by any of a number of commercially-
available IR repeaters.
The specifications for this IR input call for a triggering voltage of 5-12 volts
at no more than 100 milliamperes of current, with the tip of the
1
⁄
8
" mini-
plug having positive polarity, as below:
IR input tip polarity
+
–
5-12 volts @ less
than 100 mA
If you would like more information on the possibility of using an infrared
repeater with your Nº37, please contact your Mark Levinson dealer.
4
AES/EBU DIGITAL OUTPUT
This output provides the
digital audio signal
(
DAS
) via cables equipped
with XLR-type connectors to the digital audio processor.
This input conforms to the Audio Engineering Society/European Broadcast
Union (AES/EBU) professional digital audio standard, which calls for a 110
Ω
transmission of the DAS. Use a digital interconnecting cable specifically de-
signed for the 110
Ω
AES/EBU standard, such as Madrigal MDC-1 cable,
when using this input, with pin assignments as indicated below:
1 2
3
Pin 1: Chassis ground
Pin 2: non-inverted digital
Pin 3: inverted digital
Connector ground lug: chassis ground
It has been Madrigal’s experience that the AES/EBU interconnection stan-
dard offers the best quality of all digital transmission interfaces when fully
optimized, and we recommend its use wherever possible between Mark
Levinson components.
However, optimizing any digital interface completely represents a significant
engineering challenge. It is entirely possible that a different type of input
may actually outperform a less-than-optimized AES/EBU implementation on
some brands of digital processors. For this reason, we have gone to great
lengths to fully optimize all four of the digital outputs on the Nº37. If you
are using you Nº37 with a different brand of processor, we recommend ex-
perimenting to determine which type of input on that processor results in
the best audible performance.
